ZF 0730.110.398 WASHER | OEM Genuine Part

Overview

The ZF 0730.110.398 WASHER is a precision-engineered OEM genuine component designed to maintain critical axial clearances within the differential assembly of heavy-duty construction machinery transmissions. This hardened steel washer acts as a load-bearing shim, positioned between rotating gear sets and stationary housings to prevent metal-on-metal contact. As a factory-spec replacement for part number 0730.110.398, it ensures that gear mesh patterns remain within tolerance, directly influencing torque transfer efficiency and overall driveline longevity. This washer is frequently installed alongside the 5838109012: DIFFERENTIAL to guarantee proper preload in the carrier assembly.

Symptoms of Failure

• Transmission oil leaks from axle housing seals: When the 0730.110.398 washer wears beyond its service limit, increased end-play allows the differential carrier to shift, distorting seal contact surfaces and causing fluid seepage around the output flanges.
• Intermittent gear slipping under load: A collapsed or excessively worn washer reduces clamping force on the 0750117075: TAPER ROLLER BEARING, permitting the ring gear to walk away from the pinion during heavy excavation cycles.
• Metallic grinding noise during turns: Loss of washer thickness allows the 2093209023: DIFFERENTIAL side gears to contact the housing, producing a distinct low-pitched growl that worsens with steering input.
• Vibration in the driveline at low speeds: Uneven washer wear creates a wobble in the 5838300626: DIFFERENTIAL HOUSING, transmitting harmonic vibrations through the chassis during forward-reverse shuttle operations.

Technical Specifications

Compatibility

This OEM washer is engineered for ZF heavy-duty powershift transmissions commonly found in wheel loaders, dozers, and graders. It is a direct fit for the following ZF models: WG180, WG200, WG210, and WG310 series. The 0730.110.398 also serves as a service replacement in select 4WG-200 and 6WG-310 transmissions where the differential carrier uses a shimmed preload system. Always verify the thickness stack-up when pairing this washer with a new 5838300811: THRUST WASHER to maintain proper bearing end-play.

Related Components

Frequently Asked Questions

Q: Can the ZF 0730.110.398 washer be reused during a rebuild?
No. This is a single-use crush washer that deforms during initial torque application. Always install a new 0730.110.398 to guarantee proper preload on the taper roller bearings.

Q: What torque specification applies to the differential carrier bolts when using this washer?
For WG200 transmissions, tighten carrier bolts to 280 N·m (206 ft-lb) with the 0730.110.398 installed. Verify rotating torque of the differential after assembly; it should read between 8-12 N·m.

Q: How does this washer differ from the 5838300811 thrust washer?
The 0730.110.398 is a thin, hardened shim used between the bearing cone and differential housing, while the 5838300811: THRUST WASHER is a softer bronze-faced component that rides directly against the side gear thrust face.